CIA operations: 7 documented cases and their source records
Documented CIA operations include MKUltra, the 1953 Iran coup, the 1954 Guatemala coup, covert action in Chile, Phoenix, Operation CHAOS, and the Iran-Contra operation. This list identifies the records behind seven cases and separates what those records establish from wider claims they do not prove.
By The Black Book Audit editorial · Reviewed
The short list
- MKUltra: experiments on people without their knowledge — The CIA authorized MKUltra and conducted drug tests on unwitting subjects.
- Iran, 1953: Operation TPAJAX — The United States planned and carried out a covert operation against Mohammad Mossadegh's government.
- Guatemala, 1954: Operation PBSUCCESS — The CIA organized Operation PBSUCCESS to remove President Jacobo Árbenz.
- Chile: covert political action and the 1970 coup effort — The CIA funded covert political action in Chile and pursued a coup effort in 1970.
- Phoenix: targeting the Viet Cong's political organization — The CIA helped establish Phoenix to identify and attack the Viet Cong's political organization.
- Operation CHAOS: surveillance of domestic dissent — Some domestic activities of Operation CHAOS unlawfully exceeded the CIA's authority.
- Iran-Contra: arms sales and the covert Contra supply effort — The Iran-Contra operation involved arms sales to Iran, diverted proceeds, and a covert Contra supply effort.
What this list covers
This is a selected list of documented operations and programs, not a complete catalog of CIA activity or a ranking by severity. Cases appear in chronological order by the start of the period covered. Each FACT grade applies to the stated claim, not to every allegation associated with the case.
The documented items below link to supporting coverage and the records used to check each claim. Leads that still need review appear separately with no evidence grade.
Prepared from the linked records and reporting. The grading method explains the difference between a documented event, an allegation, and a conclusion.
The FACT label applies to the claim printed beside it. It does not establish every theory about an operation or imply that every participant committed a crime.
The records at a glance
Select a case for its sources and limits. The order follows the dates of the programs or records described.
Swipe the table sideways to read each claim →
| Case or record | Date | What is established |
|---|---|---|
| MKUltra: experiments on people without their knowledge | 1953 onward; records destroyed in 1973 | FACT The CIA authorized MKUltra and conducted drug tests on unwitting subjects. |
| Iran, 1953: Operation TPAJAX | March–August 1953 | FACT The United States planned and carried out a covert operation against Mohammad Mossadegh's government. |
| Guatemala, 1954: Operation PBSUCCESS | 1953–1954 | FACT The CIA organized Operation PBSUCCESS to remove President Jacobo Árbenz. |
| Chile: covert political action and the 1970 coup effort | 1963–1973 | FACT The CIA funded covert political action in Chile and pursued a coup effort in 1970. |
| Phoenix: targeting the Viet Cong's political organization | 1967–1972 | FACT The CIA helped establish Phoenix to identify and attack the Viet Cong's political organization. |
| Operation CHAOS: surveillance of domestic dissent | 1967–1974 | FACT Some domestic activities of Operation CHAOS unlawfully exceeded the CIA's authority. |
| Iran-Contra: arms sales and the covert Contra supply effort | 1985–1986 | FACT The Iran-Contra operation involved arms sales to Iran, diverted proceeds, and a covert Contra supply effort. |
MKUltra: experiments on people without their knowledge
The CIA authorized MKUltra and conducted drug tests on unwitting subjects.
CIA Director Allen Dulles approved MKUltra on April 13, 1953. The program funded research into drugs and behavior modification. At the August 1977 Senate hearing, CIA Director Stansfield Turner described recovered financial records covering 149 subprojects, including evidence of testing on people who did not know they were being tested.
The hearing also documented the destruction of records in January 1973 and the later discovery of financial files. Those surviving records establish a program of human experimentation. They do not establish that the CIA perfected reliable mind control.
Limit of the evidence: MKUltra and the broader history of CIA human experimentation overlap. They are one entry here, not two separate operations counted to lengthen the list.
Read the MKUltra investigation →Iran, 1953: Operation TPAJAX
The United States planned and carried out a covert operation against Mohammad Mossadegh's government.
The State Department's Iran volume includes a dedicated set of records on the planning and implementation of Operation TPAJAX between March and August 1953. The operation targeted Prime Minister Mohammad Mossadegh and is part of the documented history of the coup that removed him. This makes Iran a necessary entry in a list of CIA interventions, not a footnote to MKUltra.
The collection also lets readers examine the sequence of decisions rather than treating the coup as a single unexplained event. It is a published selection of records, not a claim that every operational file is available.
Limit of the evidence: A documented U.S. operation does not mean that Iranian participants, British involvement, or local political conditions were irrelevant.
- State Department: Iran, 1951–1954, TPAJAX records ↗
- CIA Directorate of Plans: August 1953 Iran report ↗
- BBC: CIA history acknowledges its direction of the coup ↗
Guatemala, 1954: Operation PBSUCCESS
The CIA organized Operation PBSUCCESS to remove President Jacobo Árbenz.
President Eisenhower authorized PBSUCCESS in August 1953. The CIA operation combined political action, propaganda, and a small paramilitary campaign against Guatemalan President Jacobo Árbenz, who resigned on June 27, 1954. Released CIA records include assassination planning and an instructional document found in the operation's training files.
Those are distinct claims: documents show that assassination was considered, while the CIA's own history says that its assassination strategy was not implemented. The National Security Archive publishes the records and explains the redactions that limit attempts to check the identities of proposed targets.
Limit of the evidence: An assassination plan in a file is evidence of planning. It is not, by itself, proof that a named person was killed under that plan.
Read the Guatemala evidence in the Dulles hub →Chile: covert political action and the 1970 coup effort
The CIA funded covert political action in Chile and pursued a coup effort in 1970.
The Senate's 1975 report documents CIA spending on propaganda, political parties, media, and other covert activity in Chile. It also describes the 1970 effort to promote a military coup against Salvador Allende. The same report draws an important boundary around the later coup: it found no evidence of direct U.S. involvement in the September 1973 overthrow, while documenting continued contacts with coup-oriented officers.
Both findings belong in an evidence-based list. Collapsing a decade of intervention into the claim that the CIA directly ran the 1973 coup loses the distinction the investigation itself makes.
Limit of the evidence: Documented destabilization and coup plotting in 1970 are not interchangeable with proof of direct operational control of the 1973 coup.
Read the Chile case and its sources →Phoenix: targeting the Viet Cong's political organization
The CIA helped establish Phoenix to identify and attack the Viet Cong's political organization.
Phoenix coordinated intelligence and operations against the Viet Cong's political organization in South Vietnam. A declassified 1969 memorandum describes district-level centers directing activity by police, paramilitary units, and military security forces. It also records the CIA's withdrawal from field management as U.S. military personnel took over that role.
This was a joint effort, not a program in which every action can be assigned to CIA officers. The record distinguishes people captured or killed through Phoenix-directed operations from those counted during regular military operations. That distinction matters when reading later totals.
Limit of the evidence: Program-wide death totals should not be presented as a count of people personally killed by CIA officers.
Read the Phoenix investigation →Operation CHAOS: surveillance of domestic dissent
Some domestic activities of Operation CHAOS unlawfully exceeded the CIA's authority.
Operation CHAOS began in August 1967 to investigate foreign contacts with American dissidents. The Rockefeller Commission found that it accumulated substantial information about domestic political activity. Its files included approximately 7,200 U.S. citizens, while an index held more than 300,000 names of people and organizations.
The commission concluded that some domestic activities unlawfully exceeded the agency's authority. CIA Director William Colby terminated the operation on March 15, 1974. The report is useful because it separates the stated foreign-intelligence purpose from the domestic collection that crossed the agency's legal boundary.
Limit of the evidence: The 300,000 figure counts indexed names of people and organizations, not 300,000 individual surveillance dossiers.
Read the Operation CHAOS investigation →Iran-Contra: arms sales and the covert Contra supply effort
The Iran-Contra operation involved arms sales to Iran, diverted proceeds, and a covert Contra supply effort.
The independent counsel's report documents the Iran arms sales and the covert effort to supply Nicaragua's Contras. The operation involved National Security Council staff, CIA personnel, intermediaries, and other officials. Oliver North supervised the secret Contra supply effort from the National Security Council staff.
Calling the entire affair a CIA-only operation obscures that chain of responsibility. The report also records the limits of particular investigations, including unanswered questions and incomplete testimony. Our linked investigation treats the separate Contra drug-trafficking record alongside Iran-Contra, rather than assuming that evidence for one claim automatically proves the other.
Limit of the evidence: The arms-and-funding record does not, by itself, establish every allegation about cocaine trafficking or the intent of every participant.
Read the Iran-Contra and Contra cocaine investigation →What we are still reviewing
These are research leads, not graded findings. Adding one requires source review and an editorial decision.
- OPEN · NOT GRADED
HTLINGUAL mail opening
Compare the mail-intercept chapter of the Rockefeller report with existing surveillance coverage before adding a separate entry.
Research starting point ↗ - OPEN · NOT GRADED
Post-9/11 detention and rendition
Build a separate, source-checked account of detention sites, interrogation findings, and court decisions rather than compressing them into one allegation.
Research starting point ↗ - OPEN · NOT GRADED
Bay of Pigs and Operation Mongoose
Review the invasion record separately from later sabotage and assassination plans. Competitor inclusion is a research lead, not a grade.
Research starting point ↗
What these records can and cannot tell you
Is this a complete list of CIA operations?
No. It is a selected list of seven documented operations and programs, each with a supporting page and source records. It does not claim to catalog all covert activity.
Does declassified mean that every claim in a document is true?
No. A released file can contain plans, suspicions, reports from informants, or competing accounts. The grade here applies to the specific documented claim, and each entry explains what the record does not establish.
Why is Operation Paperclip not one of these CIA operations?
We do not automatically classify every U.S. intelligence-related program as a CIA operation. Paperclip needs its own account of the agencies and dates involved before it can be compared accurately with the operations listed here.
Are these the worst CIA operations?
This list does not rank suffering or severity. It is ordered by time and selected for the availability of records and reviewed supporting coverage.